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RapidoidServerLoop.java
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RapidoidServerLoop.java
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package org.rapidoid.net.impl;
import org.rapidoid.activity.RapidoidThread;
import org.rapidoid.annotation.Authors;
import org.rapidoid.annotation.Since;
import org.rapidoid.commons.Rnd;
import org.rapidoid.config.ConfigUtil;
import org.rapidoid.log.Log;
import org.rapidoid.net.Protocol;
import org.rapidoid.net.Server;
import org.rapidoid.net.TCPServerInfo;
import org.rapidoid.u.U;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.nio.channels.*;
import java.util.Iterator;
import java.util.Set;
/*
* #%L
* rapidoid-net
* %%
* Copyright (C) 2014 - 2016 Nikolche Mihajlovski and contributors
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
@Authors("Nikolche Mihajlovski")
@Since("2.0.0")
public class RapidoidServerLoop extends AbstractLoop<Server> implements Server, TCPServerInfo {
private static final int MAX_PENDING_CONNECTIONS = 16 * 1024;
private volatile RapidoidWorker[] ioWorkers;
private RapidoidWorker currentWorker;
private final String address;
private final int port;
private int workers = ConfigUtil.cpus();
private boolean blockingAccept = false;
protected final Protocol protocol;
private final Class<? extends RapidoidHelper> helperClass;
private final Class<? extends DefaultExchange<?>> exchangeClass;
private ServerSocketChannel serverSocketChannel;
private final Selector selector;
private final int bufSizeKB;
private final boolean noDelay;
private final boolean syncBufs;
public RapidoidServerLoop(Protocol protocol, Class<? extends DefaultExchange<?>> exchangeClass,
Class<? extends RapidoidHelper> helperClass, String address, int port,
int workers, int bufSizeKB, boolean noDelay, boolean syncBufs) {
super("server");
this.protocol = protocol;
this.exchangeClass = exchangeClass;
this.address = address;
this.port = port;
this.workers = workers;
this.bufSizeKB = bufSizeKB;
this.noDelay = noDelay;
this.syncBufs = syncBufs;
this.helperClass = U.or(helperClass, RapidoidHelper.class);
try {
this.selector = Selector.open();
} catch (IOException e) {
Log.error("Cannot open selector!", e);
throw new RuntimeException(e);
}
}
@Override
protected final void beforeLoop() {
validate();
try {
openSocket();
} catch (IOException e) {
throw U.rte("Cannot open socket!", e);
}
}
private void validate() {
U.must(workers <= RapidoidWorker.MAX_IO_WORKERS, "Too many workers! Maximum = %s",
RapidoidWorker.MAX_IO_WORKERS);
}
private void openSocket() throws IOException {
U.notNull(protocol, "protocol");
U.notNull(helperClass, "helperClass");
String blockingInfo = blockingAccept ? "blocking" : "non-blocking";
Log.debug("Initializing server", "address", address, "port", port, "sync", syncBufs, "accept", blockingInfo);
serverSocketChannel = ServerSocketChannel.open();
if ((serverSocketChannel.isOpen()) && (selector.isOpen())) {
serverSocketChannel.configureBlocking(blockingAccept);
ServerSocket socket = serverSocketChannel.socket();
Log.info("!Starting server", "!address", address, "!port", port, "I/O workers", workers, "sync", syncBufs, "accept", blockingInfo);
InetSocketAddress addr = new InetSocketAddress(address, port);
socket.setReceiveBufferSize(16 * 1024);
socket.setReuseAddress(true);
socket.bind(addr, MAX_PENDING_CONNECTIONS);
Log.debug("Opened server socket", "address", addr);
if (!blockingAccept) {
Log.debug("Registering accept selector");
serverSocketChannel.register(selector, SelectionKey.OP_ACCEPT);
}
initWorkers();
} else {
throw U.rte("Cannot open socket!");
}
}
private void initWorkers() {
ioWorkers = new RapidoidWorker[workers];
for (int i = 0; i < ioWorkers.length; i++) {
RapidoidWorkerThread workerThread = new RapidoidWorkerThread(i, protocol, exchangeClass,
helperClass, bufSizeKB, noDelay, syncBufs);
workerThread.start();
ioWorkers[i] = workerThread.getWorker();
if (i > 0) {
ioWorkers[i - 1].next = ioWorkers[i];
}
}
ioWorkers[ioWorkers.length - 1].next = ioWorkers[0];
currentWorker = ioWorkers[0];
for (RapidoidWorker worker : ioWorkers) {
worker.waitToStart();
}
}
@Override
public synchronized Server start() {
new RapidoidThread(this, "server").start();
waitForStatusOtherThan(LoopStatus.INIT, LoopStatus.BEFORE_LOOP);
if (status == LoopStatus.FAILED) {
throw U.rte("Server start-up failed!");
}
return super.start();
}
@Override
public synchronized Server shutdown() {
Log.info("Shutting down the server...");
stopLoop();
if (ioWorkers != null) {
for (RapidoidWorker worker : ioWorkers) {
worker.shutdown();
}
}
if (serverSocketChannel != null && selector != null && serverSocketChannel.isOpen() && selector.isOpen()) {
try {
selector.close();
serverSocketChannel.close();
} catch (IOException e) {
Log.warn("Cannot close socket or selector!", e);
}
}
super.shutdown();
Log.info("!The server is down.");
return this;
}
public synchronized RapidoidConnection newConnection() {
int rndWorker = Rnd.rnd(ioWorkers.length);
return ioWorkers[rndWorker].newConnection();
}
public synchronized void process(RapidoidConnection conn) {
conn.worker.process(conn);
}
@Override
public synchronized String process(String input) {
if (ioWorkers == null) {
initWorkers();
}
RapidoidConnection conn = newConnection();
conn.setInitial(false);
conn.input.append(input);
conn.setProtocol(protocol);
process(conn);
return conn.output.asText();
}
public Protocol getProtocol() {
return protocol;
}
@Override
public TCPServerInfo info() {
return this;
}
@Override
public long messagesProcessed() {
long total = 0;
for (int i = 0; i < ioWorkers.length; i++) {
total += ioWorkers[i].getMessagesProcessed();
}
return total;
}
@Override
protected void insideLoop() {
if (blockingAccept) {
processBlocking();
} else {
processNonBlocking();
}
}
private void processNonBlocking() {
try {
selector.select(50);
} catch (IOException e) {
Log.error("Select failed!", e);
}
try {
Set<SelectionKey> selectedKeys = selector.selectedKeys();
synchronized (selectedKeys) {
Iterator<?> iter = selectedKeys.iterator();
while (iter.hasNext()) {
SelectionKey key = (SelectionKey) iter.next();
iter.remove();
acceptChannel((ServerSocketChannel) key.channel());
}
}
} catch (ClosedSelectorException e) {
// do nothing
}
}
private void processBlocking() {
acceptChannel(serverSocketChannel);
}
private void acceptChannel(ServerSocketChannel serverChannel) {
try {
SocketChannel channel = serverSocketChannel.accept();
currentWorker.accept(channel);
currentWorker = currentWorker.next;
} catch (IOException e) {
Log.error("Acceptor error!", e);
}
}
}